I started following hockey as a toddler; I didn't start following the NFL until later and the NBA always has been a casual spectacle for me. I don't remember McAdoo or OJ as actual players (well, I remember OJ as a Niner I guess) so this was an interesting read.
I've been told that one point, OJ was one of the most recognizable people in the world. I know that speaks to celebrity rather than greatness, but that celebrity was built on something.
I do wonder whether, without the murder charge, OJ would be a "bigger name" than Hasek in, say, Central Europe today.